When they place Jesus body in the tomb, they rolled a stone in front of the door and placed armed Roman Soldiers in front of it to make sure that He couldn't escape. They all watched Him die on that cross. What were they worried about? The tomb door was further protected with the Roman seal, which carried the authority of the most powerful government in the known world. If Jesus "escaped", the soldiers would be jailed or even put to death. Well, it turned out that they were justified in their fears because there ain't no grave that could hold Jesus down! Jesus did in fact rise out of that grave on the 3rd day, and the rest is history.